Method and apparatus for transmitting uplink control information in a wireless communication system

Abstract

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting uplink control information in a wireless communication system. A method for transmitting uplink control information in a wireless communication system according to one embodiment of the present invention comprises a step of repetition coding information bit of N-bit to generate an encoded bit; and a step of transmitting the encoded bit via a physical uplink shared channel, wherein bit inversion can be applied to the bit obtained by repeating the information bit of N-bit, on the basis of the number 1 contained in the information bit of N-bit.

The invention claimed is: 
     
       1. A method for transmitting uplink control information in a wireless communication system, the method comprising:
 generating encoded bits by repeatedly coding N information bits, wherein N is a finite integer; and 
 transmitting the encoded bits through a physical uplink shared channel (PUSCH), 
 wherein bit inversion is applied to bits obtained by repeating the N information bits on the basis of the number of 1s included in the N information bits wherein the bits obtained by repeating the N information bits are located as most significant bits (MSBs) or least significant bits (LSBs) of the encoded bits, and 
 wherein the N information bits are repeated when the number of 1s included in the N information bits is an even number, and the N information bits are inverted and then repeated when the number of 1s included in the N information bits is an odd number. 
 
     
     
       2. The method according to  claim 1 , wherein the encoded bits are interleaved on a bit-by-bit basis, on a bit block basis according to a modulation order, or on a repeated block basis. 
     
     
       3. The method according to  claim 1 , wherein the least significant bits (LSBs) of the encoded bits are punctured according to a size of a transmission resource element (RE). 
     
     
       4. The method according to  claim 1 , wherein a constellation of bits obtained by modulating the encoded bits is located farthest from a zero point of an I-Q plane. 
     
     
       5. The method according to  claim 1 , wherein N is 3 or larger. 
     
     
       6. The method according to  claim 1 , wherein the N information bits correspond to a rank indicator (RI) or Hybrid Automatic Repeat request(HARQ)—ACKnowledgement/Negative ACKnowledgement (ACK/NACK) information. 
     
     
       7. The method according to  claim 1 , wherein the N information bits are [O 0  O 1  O 2 ], the bits obtained by repeating the N information bits are [O 3  O 4  O 5 ], the encoded bits are [O 0  O 1  O 2  O 3  O 4  O 5  ] in case of a modulation order of 2, the encoded bits are [O 0  O 1  1 1 O 2  O 3  1 1 O 4  O 5  1 1 ] in case of a modulation order of 4, and the encoded bits are [O 0  O 1  1 1 1 1 O 2  O 3  1 1 1 1 O 4  O 5  1 1 1 1] in case of a modulation order of 6. 
     
     
       8. A User Equipment (UE) transmitting uplink control information in a wireless communication system, the UE comprising:
 a transmitter configured to transmit an uplink signal to an evolved Node B (eNB); 
 a receiver configured to receive a downlink signal from the eNB; and 
 a processor configured to control the receiver and the transmitter, 
 wherein the processor is configured to generate encoded bits by repeatedly coding N information bits and to transmit the encoded bits through a physical uplink shared channel (PUSCH) wherein N is a finite integer, 
 wherein bit inversion is applied to bits obtained by repeating the N information bits on the basis of the number of 1s included in the N information bits, wherein the bits obtained by repeating the N information bits are located as most significant bits (MSBs) or least significant bits (LSBs) of the encoded bits, and 
 wherein the N information bits are repeated when the number of 1s included in the N information bits is an even number, and the N information bits are inverted and then repeated when the number of 1s included in the N information bits is an odd number.